I think they work well and they are LOUD. But I'm a little worried about durability. The plastic body feels a little flimsy and one of the two doesn't fit perfectly. They stay together but feel and look cheap. I worry that a few months or a year of fiddling with my purse could lead to a breakdown. But to be honest if they last a year they're still a decent deal at this price point. I think that's a decent deal for a budget-friendly personal alarm. Just my thoughts, AK
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